Maecel deprez



(No Model.)

M. DEPREZ. IRON CORE FOR DYNAMO ELECTRIC MACHINES.

No. 427,405. Patented May 6, 1890.

Qiiornqy,

PATENT OFFICE.

MARCEL DEPREZ, OF PARIS, FRANCE.

IRON CORE FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 427,405, dated May 6, 1890. Application filed December 7, 1885. Serial N0.184,86'7. (N0 model.) Patented in France November 4, 1885, No. 172,068

To all whom it may concern.-

Be it known that I, MARCEL DEPREZ, a citizen of the Republic of France, residing at Paris, France, have invented certain new and useful Improvements in Constructiu g Iron lores for Inductors and Induced Bodies of Dynamo-Electric Machines; and I do hereby declare the following to be-a full, clear, and exact description of the invention, such as will enable others skilled in the art to which appertains to make and use the same.

My invention, for which I have obtained Letters Patent in France, No. 172,068, on November 4, 1885, has reference to improvements in armature-cores for dynamo-electric generators and motors; and it consists, broadly speaking, of a magnetic ring-core composed of laminated hollow cellular segments or sections. These segments or sections are in direct magnetic contact circtnnferentially; but the laminae of each section are separated from each other by non-magnetic and preferably insulating material. Thus each segment or section of the core is composed of a number of groups of segmental laminae fitted and bolted together to form a hollow cellular core section or segment, and the different sections of the core are assembled together to form the ring upon which the armature-coils are placed. Each core-section is therefore manufactured independently of all the others, and the arm ature coils may be placed upon each section before the sections are assembled, whereby I am enabled to wind each coil with comfort and expeditiously without handling the whole completed core. By reason of the laminated cellular structure of the ring-core the heating of the same is effectually prevented,

In the accompanying drawings, which form a part of this specification, I have shown, in Figure 1, an end View of my improved armature-ring core with parts broken away and in section; in Fig. 2, a perspective view of a laminated ring-section with the locking-bar and supporting-spoke; in Fig. 3, an elevation of one lamina of the core; and in Fig. 4 a section on the curved line 00 a, Fig. 2, showing three of the groups of laminae which compose a ring-section, with the connecting-rod and the plug of insulating material in position.

Like numerals of reference indicate like parts throughout the drawings.

In the construction of my improved ringeore I use laminae 1, of sheet-iron, formed substantiallyin the manner illustrated in Fig. 3- that is to say, sheets of iron stamped or cut out to form in. the main the sectors of a ring. The two concentric curved portions 2 3 of the lamina are connected by radial webs l 5 6 U, one of these webs et forming the radial end face of the lamina, while the other radial web 5 is located inside of the other end of the lamina, so that the curved portions 2 3 project beyond the web 5 and form with the same a recess 7 for the reception of a connecting-barS, as will hereinafter more fully appear.

The webs 6 (3 are intermediate between the webs a 5, as shown, so that the whole lamina represents a skeleton frame wit-h three openings, and a recess at one end. The terminal webs l 5 are somewhat enlarged, and are perforated for the reception of rivets f), by means of which a group of the laminae are firmly connected. In Fig. 2 I have shown five such groups 10 11 12 13 14, three of which 10 11 12 are also shown in Fig. 4.

\Vhen thelaminae are assemblediuto a group, their faces are separated from each other by thin sheets non-magnetic, preferably insulating, material--such as paper-0r the laminae may be varnished and then assembled. The separating sheets of paper or the layers of varnish are as thin as practicable, and in the drawings the lines which mark the junctures of the successive laminae are also intended to represent the layers of paper or other insulating material. The groups 10 11 12, &c., are assembled together, as shown in Figs. 2

and 1, with the radial webs 4: of one group against the radial web 5 of the adjoining group, so that when the ring-section is built up in the manner shown in Fig. 2 the inner ends of the recesses 7 of one group will be flush with the outer ends of the radial webs I of the next succeeding group, and the recesses 7 of alternate groups at each end will register with each other, as clearly shown in Fig. 2.

In the construction of the terminal groups of each ring-section there are used a few laminze, from which the intermediate webs (3 t; are removed. This is clearly shown in Figs. 2 and 4 with reference to the group 10, where it will be seen that there are at one end of the group a number of laminae having no intermediate webs 6 6. In this manner room is provided for the head 15 of a plug 16 of insulating material, which is inserted in the space or cells inclosed by the webs 6 (5, the

.head 15 being thus allowed to be either flush with the first lamina of the group or, as shown in Fig. 4, fairly within the face of such lamina. Such plug 16 is inserted in each terminal group, and the two plugs are connected by a binding-rod 17, screw-threaded and provided with a nut 18 at each end. In this manner the groups 10 11 12 13 14:, &c., are socurely bound together to form a ring-section.

In. the drawings, Fig. 1, I have shown the whole ring composed of six sections built up in the manner heretofore described; but it will be understood that the ring may be composed of any other number of sections. The sections are united as follows: From each end of the hub 19, fixed upon the armature-shaft 20, radiate spokes 21, which are forked at their 0 uter ends, the space between the prongs 22 of the fork being approximately shaped and sized to conform to the recesses 7, and the locking-bar 8, preferably of wood, is shaped to fit into therecesses 7 and into the forks at the ends of the spokes; and it will now be seen that as the laminated ring-sections are placed with their radial ends against each other the projecting ends 2 3 of one Will be lodged between the like ends of the other,being thus in a manner tenoned or spliced to each other and locked together by the bars 8, which are firmly seated and bolted in the forks of the spokes, as shown.

From the construction of my improved armature-ring core it is evident that it is easy to dismount the ring, to separate itinto its sections, and to separate the groups of each section for inspection and repair and that it is equally easy to build up the ring again from its laminated cellular groups.

If in place of the rivets 9, which connect the lamimc of each group, screw-bolts are used, then all the lamina: of which the core is composed maybe separated for inspection and. repair, and can be expeditiously reassembled again.

Having now fully described my invention, I claim and desire to secure by Letters Patent 1. In an armature for a dynamo-electric machine, a magnetic ring-core composed of segmental laminae of iron, each lamina shaped as an open frame, substantially as described.

2. In a dynamo-electric machine, an iron ring-core composed of laminated hollow cellular segments, substantially as described.

3. In an armature for dynamo-electric machines, a magnetic ring-core composed of separable sections, each section being composed of segmental laminze, each shaped as an open frame, substantially as described.

4. An armature-ring core for dynamo-elce tric machines composed of separable sections, each section being composed of separable groups of laininze of iron, each shaped as an open frame, substantially as described.

5. An armature-ring core for dynamo-electric machines composed of laminated cellular segments tenoned or spliced together end to end, substantially as described.

6. In an armature-ring core for dVnamo-eleetric machines, the combination of a series of laminated cellular segments tenoned or spliced together end to end with locking-bars connected with the hub of the armature for retaining the segments in position, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

MARCEL DEPREZ.

\Vitnesses:

FRANK GERALDY, ALBERT OAHEN, Jr. 

